1234567 sc: thatbitxh.lizzy

Answer:

true

Explanation:

PV=nRT

The ideal gas law states that PV = NkT, where P is the absolute pressure of a gas, V is the volume it occupies, N is the number of atoms and molecules in the gas, and T is its absolute temperature. The constant R is called the Boltzmann constant

Answer: B

Explanation: None of the others make sense, if the results were unexpected, so what, it's what happened. If you're confused try again to see if there was a flaw or not.

The pH of H2SO4 is 1.20×10–2.

We need to determine the pH of a 0.310 M solution of H2SO4.In order to find pH, we'll need to find the [H+] of the solution.

At equilibrium, the concentration of H+ will be twice that of the initial concentration of H2SO4.

Thus, [H+] = 2 × 0.310 = 0.620 M

The concentration of [SO42-] will also be 0.310 M.

Using the Ka2 expression for H2SO4 gives:

Ka2 = ([H+][SO42-])/[H2SO4]1.20 × 10-2 = (0.620 x 0.310)/[H2SO4][H2SO4] = 0.12 M

The [H+] in the solution is 2 × 0.310 = 0.620 M,

so:

pH = -log([H+]) = -log(0.620) = 0.2064 (rounded to four significant figures)pH = 0.21 (rounded to two significant figures)

Therefore, the pH of a 0.310 M solution of H2SO4 is 0.21.

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Answer:

True

Explanation:

All irreversible reactions go to completion because the process cannot proceed in the backward direction.

A reversible reaction is one that does not go into completion in one direction.

An irreversible direction completely uses up the reactants to form the products and goes into completion.

These reactions can only proceed in one direction and not both.

Answer:

Boyle's law is a gas law given by the Anglo-Irish chemist Robert Boyle in 1662.

Explanation:

Boyle's law is a gas law given by the Anglo-Irish chemist Robert Boyle in 1662. He stated that the pressure exerted by a gas is inversely proportional to the volume occupied by it at a constant mass and temperature.

Mass Number: Atomic Weight Of Sodium

What Are Ionic Compounds: Difference Between Baking Soda And Baking Powder

Answer:

Thermal, is mainly the heat trapped or in an object, such as a boiling water over a stove, its trapped and countinues to get hotter

Heat is basically the releasing of the energy that is contained in an object.

Thermal is the objects temperature, while heat is the Thermal energy that is released.

Explanation:

Answer:

Yes, entropy increases

Explanation:

Entropy may be defined as a thermodynamic quantity which represents the unavailability of thermal energy of any system for conversion into some mechanical work. It is also the randomness or the degree of disorder of the system.

Entropy increases when the system is more disordered. Entropy also increases when the temperature of the system is increased. The system with higher temperature means the particles have a high kinetic energy which in turn make the particles more dis order. And thus the entropy of the system increases.  

Answer: Here u go!

Explanation:

Glucose reacts with methanol in the presence of HCl and gives α and β glucoside. Glucoside formation is due to the reaction of alcohol with glucoside -OH group of glucose. β, D glucose is forms β, D-methyl glucoside. In the same way, fructose forms fructoside. 2. Oxidation Glucose when treated with bromine water, forms gluconic acid.

Hope this helps!

Answer:

down

Explanation:

Answer

(a) F

Pole Star is a star in the galaxy and hence not a part of the solar system.

(b) T

Mercury is the smallest planet in the solar system and Jupiter is the largest planet in the solar system.

(c) T

Uranus is the farthest planet to the sun in the solar system and Mercury is the closest planet to the earth in the solar system.

(d) T

INSAT or Indian National Satellite System is a series of artificial Indian satellites used for telecommunications, meteorology and search and rescue operations.

(e) F

There are eight planets in the solar system. They are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune. Note the pluto is considered as a dwarf planet.

(f) F

Orion can be seen with naked eyes. It is one of the most magnificent constellations in the sky. It has seven or eight bright stars. Orion is also called the Hunter

In this exercise, we have to use our knowledge of astronomy to identify the correct alternatives, so we find that:

1)C

2)B

3)A

4)B

5)D

6)C

Then, based on astronomy knowledge, we can identify that the true alternatives correspond to:

1)A meteor happen a streak of light above bring into being by a meteor superlative through Earth's general feeling or mood.

2)Meteoroids exist lumps of rock or iron that revolution the brightest star, just as celestial body orbiting a star, asteroids, and comets act.

3)A coma happen the fuzzy-anticipate glow that maybe visualize situated on sides the head of a comet.

4)Halley's Comet, that happen 8 kilometres (5 miles) expansive and 16 km long, travels around the Sun each 75 to 76 age in an lengthened circuit.

5)Shooting stars exist existent what astronomers call meteors. Most meteors upset fashionable the gases around the earth before they reach the ground.

6)The celestial body orbiting a star belt happen a torus-form domain in the Solar System, situated about middle from two points the orbits of the celestial body orbiting a star Jupiter and Mars.

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Answer:

The answer is (c) Zn(No3)2

Explanation:

Because we know the cation of zinc is+2 and whereas nitrate is anion, -1.

Answer:  5.43x10^23 g/mole M&M's

Explanation:

1 bag of M&M's = 1.75oz       (1.75oz)*(453.6g/16oz) = 49.61 g

1 bag = 55 M&M's

(49.61 g)/55 M&M = 0.9021 g/MM

1 mole M&M's = 6.023x10^23 M&M's

(6.023x10^23 M&M's)*(0.9021 g/MM's) = 5.43x10^23 g/mole  molar mass

Answer:

Density is the only thing affecting whether something floats or sinks. If an object has a higher density than the fluid it is in (fluid can mean liquid or gas), it will sink. If it has a lower density, it will float.

Explanation:

Answer:

the chemical formula of sodium chloride

Explanation:

: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

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Answer:37

Explanation:

Because mass number is proton number + neutron number

The two ways in which the physical state of matter can be changed are melting and freezing.

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Neurotransmitter released In the Mg2+ extracellular fluid compare to that in the control extracellular fluid because  Mg2+ ions are positively charged and can attract negatively charged molecules such as neurotransmitters.

This attraction can help to speed up the release of neurotransmitters and make the overall process more efficient.In contrast, an extracellular fluid that does not contain Mg2+ ions may be less conductive and therefore may have a slower or less efficient release of neurotransmitters. This could result in slower signal transmission and overall slower neural processing.

Neurotransmitter is a chemical that is released from neurons and is used to transmit signals to other neurons or muscles. Mg2+ is a divalent cation that is known to be involved in a variety of cellular processes, including the release of neurotransmitters. In general, an extracellular fluid that contains Mg2+ ions will be more conductive than one that does not.

In summary, the presence of Mg2+ ions in the extracellular fluid can help to speed up the release of neurotransmitters and make the overall process more efficient.

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Answer:

D

\( \: \: \: \: \)

A balanced half-reaction describing the oxidation of aqueous bromide anions to gaseous dibromine Br₂(g) + 2e ----------> 2Br⁻ (aq).

Redox is a type of chemical response in which the oxidation states of the substrate change. Oxidation is the lack of electrons or a growth in the oxidation nation, likewise, the reduction is the advantage of electrons or a lower inside the oxidation state.

While oxygen combines with detail or compound, an oxidation reaction occurs. Oxidation can also be defined as the procedure of the removal of hydrogen from the reactant species. Oxidation is the procedure of losing electrons by means of a molecule, atom, or ion.

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Answer:

3.97 x 10^-19 J

Explanation:

The energy E of a photon is given by:

       E = hf where h = Planck's constant = 4.14 × 10−15 eV · s and f = frequency

In this case, f = 6×10^14s−1, hence, the energy E of one photon of the light would be;

E = 4.14 × 10−15 eV · s x 6×10^14s−1

               =  2.484 eV

Note that:

1 eV = 1.60 × 10−19 J

Hence,

2.484 eV = 2.484 x 1.60 × 10−19 J

              = 3.97 x 10^-19 J

It will have no effect because the order in which elements exist mixed will not vary the fact that matter cannot be made nor destroyed. Therefore, the correct answer is option b. The same as the mass of the liquid.

The order in which we add the ingredients does not involve the mass of the jelly because the order in which ingredients exist mixed will not alter the reality that matter cannot be made nor destroyed.

The mass of the jelly remains exact due to the incorporation of the exact quantity of ingredients.

It will have no effect because the order in which elements exist mixed will not vary the fact that matter cannot be made nor destroyed.

Therefore, the correct answer is option b. The same as the mass of the liquid.

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Answer:serch it up i found it on the second website

Explanation:

An acid chloride is much more reactive toward nucleophiles than an ester because Cl– is a much weaker base than RO– and is therefore a better leaving group.

In the context of nucleophilic substitution reactions, a nucleophile attacks the carbonyl carbon of an acid chloride or an ester, displacing the leaving group and forming a new bond to the carbonyl carbon. In the case of an acid chloride, the chloride ion is a better leaving group than the alkoxide ion in an ester, because it is less basic and more stable. This means that when a nucleophile attacks an acid chloride, the chloride ion is more easily displaced, leading to a faster and more efficient reaction.

Additionally, the electronegativity of the chlorine atom in an acid chloride is higher than that of the oxygen atom in an ester. This means that the carbonyl carbon in an acid chloride is more electrophilic and more prone to attack by a nucleophile than the carbonyl carbon in an ester.

In summary, the higher reactivity of acid chlorides toward nucleophiles compared to esters is due to the weaker basicity and better leaving group ability of the chloride ion, as well as the higher electrophilicity of the carbonyl carbon in an acid chloride.

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At equilibrium, the concentrations of the gases are approximately 0.35 mol/L for \(N_2\), 0.55 mol/L for \(H_2\), and -0.05 mol/L for \(NH_3\). The negative concentration of \(NH_3\)signifies that the equilibrium position lies towards the reactants.

To calculate the equilibrium concentrations for all the gases in the reaction, we need to consider the stoichiometry and the given information.

The balanced equation for the reaction is:

\(N_2\)(g) + 3\(H_2\)(g) ⇌ 2\(NH_3\)(g)

Given:

Initial moles of \(N_2\)= 2

Initial moles of \(H_2\)= 2

Total volume = 5.00 L

At equilibrium, 25% of the nitrogen gas is converted to ammonia. This means that 0.25 moles of \(N_2\)have been converted to \(NH_3\).

To determine the equilibrium concentrations, we need to take into account the change in moles and the volume of the container.

Initial moles of \(N_2\)= 2

Change in moles of \(N_2\)= -0.25 (since 25% is converted)

Equilibrium moles of \(N_2\)= Initial moles + Change in moles = 2 - 0.25 = 1.75

Initial moles of \(H_2\)= 2

Change in moles of \(H_2\)= -3 * (-0.25) = 0.75 (based on the stoichiometric ratio)

Equilibrium moles of \(H_2\)= Initial moles + Change in moles = 2 + 0.75 = 2.75

Equilibrium moles of \(NH_3\)= Change in moles of N2 = -0.25

Now, we can calculate the equilibrium concentrations by dividing the moles by the total volume:

Concentration of \(N_2\)= (moles of N2) / (total volume) = 1.75 / 5.00 = 0.35 mol/L

Concentration of \(H_2\)= (moles of H2) / (total volume) = 2.75 / 5.00 = 0.55 mol/L

Concentration of \(NH_3\)= (moles of \(NH_3\)) / (total volume) = -0.25 / 5.00 = -0.05 mol/L (negative value due to the stoichiometry)

It's important to note that the negative concentration of \(NH_3\) indicates that the reaction has reached equilibrium, and the concentration of \(NH_3\)is very low compared to the initial concentrations of \(N_2\)and \(H_2\).

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Answer:

Atomic models are important because, they help us visualize the interior of atoms and molecules, and thereby predicting properties of matter.

Explanation:

We study the various atomic models in our course of study because, it is important for us to know, how did people come to the present concept of an atom. How did physics evolve from classical to quantum physics.

All these are important for us to know and thus, knowledge about various atomic models, their discoveries and drawbacks and finally improvements based on scientific evidence present at that time is important for us to understand the underlying theory very well.

Explanation:

A DAY IN THE LIFE OF METIS JOURNAL. I WROTE IT HOPE U LIKE IT XD

We, who live in the west, were Nomadic. So we always moved from place to place to hunt buffalo and other fur-bearing animals. And now again we have to shift everything we collected , like, all the essential needs we collected. It’s really hard to shift stuff, But when you move to a new place you get to see new beautiful places. They are just so satisfying to see! It’s like all my work(like the shifting work) is paid off. I love it! We always meet the Hudson’s bay company employees, and give them furs which we took from the bissons and other furry animals we hunted. And in exchange they give us their (Hudson’s Bay company) goods. Which is good! Because then we or I won't be able to enjoy that delicious pemmican!

 The one reason that makes me proud of my parents is that because of them I am like a translator for both sides in the fur trade! Anyways coming back to the present. As I said before, we were moving today to another place, But on the way some people along with my father will ride the famous York boats carrying supplies to fur posts. I begged my father to take me with him! And as usual he gave me some silly reason for me to stay. And now since I don’t have anything to do I will-..Nevermind, My mom’s calling me. Okay after helping my mom keep the fur posts into the York boats me , my mom, and the others are just relaxing and enjoying nature just to take a break. Since, I am so obsessed with my Journal notebook today I’m just going to sit here and right what comes to my mind. I’m not like the others who always seem to be talking with someone. I like my own space! 

I kind of miss my dad already, but he and his fellow members need to travel the waterways from the red river further west and north to hudson bay. These red river carts also travel the trek back and forth over land to St. Paul, Minnesota and to posts in saskatchewan.  Speaking about the red river, the only large settlement in the region is the red colony. About 12000 people lived in this colony around Fort Garry. Some were the original Selkirk settlers or their descendents. They had come from Scotland with lord Selkirk when he established the colony in 1811. Many of these original settlers were poor farmers who had been displaced  from their lands in scotland. They had endured many hardships in the early years of settlement, including foods, hunger, and sickness. I love studying about other colonies, cultures , history etc.

Answer:

Sugar

Explanation:

This is because water and carbon dioxide are required during photosynthesis. Oxygen along with glucose, that is a type of sugar is produced. The oxygen is diffused out in to the air, while the sugars are stored in the leaf thus light energy captured during photosynthesis is stored as 'sugar'

You can fill in the table for other elements and their respective isotopes by determining the appropriate number of protons, neutrons, and electrons based on the given isotope mass number and atomic number.

To accurately fill in the table with the correct number of subatomic particles for the elements given the isotope mass number, we need to consider the composition of atoms and their respective subatomic particles. Atoms are composed of protons, neutrons, and electrons.

The number of protons in an atom is equivalent to its atomic number, which uniquely identifies the element. The number of neutrons can be determined by subtracting the atomic number from the isotope mass number. Electrons in a neutral atom are equal to the number of protons.

Let's take an example using the isotope mass number:

Isotope: Carbon-14 (mass number = 14)

Element: Carbon (atomic number = 6)Based on the atomic number and isotope mass number, we can determine the number of subatomic particles as follows:

Protons: 6 (same as the atomic number)

Neutrons: 14 - 6 = 8

Electrons: 6 (same as the number of protons in a neutral atom)

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The specific heat of the unknown metal is 0.128 J/g°C. This means that it takes 0.128 joules of energy to raise 1 gram of metal by 1 degree Celsius.

To calculate the specific heat of a metal, the following formula should be used.

Q = m*c*ΔT where:

Q = amount of energy absorbed by the metal

m = mass of metal

c = specific heat of the metal

ΔT = temperature change of the metal

Assume the mass of the metal is 50 g, the amount of energy absorbed by the metal is 6000 J, and the initial and final temperatures of the metal are 25 °C and 955 °C respectively. Therefore, you can substitute these values ​​into expressions.

6000J = 50g x c x (955°C to 25°C)

Simplifying the equation, we get:

6000J = 50g*c*930°C

Dividing both sides by (50g * 930°C) gives:

c = 0.128 J/g°C

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Answer:

During the completion of mitosis (telophase), two new nuclei form around the separated sets of daughter chromosomes (see Figure 8.29).

Explanation: